[release] ChirpStack MQTT Forwarder v4.2

Announcements
1

v4.2.0

Features

paho-mqtt to rumqttc refactor

This refactors the code to use rumqttc instead of paho-mqtt as MQTT client library. As rumqttc is a pure-Rust MQTT client, which uses rustls for TLS, it is no longer needed to statically link against OpenSSL.

Improvements

  • Add AMD64 build. (#46)
  • Reconnect ZeroMQ REQ socket on error.
  • Update dependencies.

Bugfixes

  • Fix extending meta-data in Concentratord backend.
  • Fix udp_bind > bind error in config examples. (#49)
  • Fix corrupted payloads on mips / mipsel platforms. (#50, #52)
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2

v4.2.1

Bugfixes

  • Fix firewall security issue on Kerlink gateways.
3

v4.2.2

Bugfixes

  • Fix mips corrupted payloads regression re-introduced by v4.2.1. (#50)
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v4.2.3

Improvements

  • Add keep_alive_interval config option for MQTT. (#54)
  • Update internal dependencies.
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